Microscopic image of the hydrogel (IMAGE) Kiel University Caption The hydrogel is streaked with microchannels of ultralight, electrically conductive graphene. Credit Irene Wacker Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.